Abstract
DEVELOPMENT AND VALIDATION OF UV SPECTROSCOPIC METHOD FOR ESTIMATION OF RITONAVIR IN TABLET DOSAGE FORM

Gauri J. Sonavane*, Tulsi A. Ahuja, Rohant V. Ahire, Kalpesh V. Sonar and Parag R. Patil

ABSTRACT

Objective: To develop and validate simple, rapid, linear, accurate, precise and economical UV Spectroscopic method for estimation of Ritonavir in tablet dosage form. Methods: The drug is freely soluble in analytical grade methanol. The drug was identified in terms of solubility studies and on the basis of melting point which is done on melting point apparatus of Equiptronics. It showed absorption maxima were determined in analytical grade methanol. The drug obeyed the Beer’s law and showed good correlation of concentration with absorption which reflect in linearity. The UV spectroscopic method was developed for estimation of Ritonavir in tablet dosage form and also validated as per ICH guidelines. Results: The drug is freely soluble in analytical grade methanol, soluble in isopropanol and practically insoluble in water. So, the analytical grade methanol is used as a diluent in method. The melting point of Ritonavir was found to be 130-131˚C (uncorrected). It showed absorption maxima 252 nm in analytical grade methanol. On the basis of absorption spectrum, the working concentration was set on 50µg/ml (PPM). The linearity was observed between 10-90 μg/ml (PPM). The results of analysis were validated by recovery studies. The recovery was found to be 98.75, 98.00 and 99.17% for three levels respectively. The % RSD for precision was found to be 0.99% and for Ruggedness is 0.57%. Conclusion: A simple, rapid, linear, accurate, precise and economical UV Spectroscopic method has been developed for estimation of Ritonavir in tablet dosage form. The method could be considered for the determination of Ritonavir in quality control laboratories.

Keywords: Ritonavir, UV Spectrophotometer, Melting Point, Assay Method, Validation, Accuracy, Linearity, Ruggedness, Precision.


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